CN111762961A - Kitchen wastewater treatment method - Google Patents
Kitchen wastewater treatment method Download PDFInfo
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- CN111762961A CN111762961A CN202010563061.4A CN202010563061A CN111762961A CN 111762961 A CN111762961 A CN 111762961A CN 202010563061 A CN202010563061 A CN 202010563061A CN 111762961 A CN111762961 A CN 111762961A
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- wastewater
- effluent
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- kitchen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/15—N03-N
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a kitchen wastewater treatment method, which comprises the following steps: 1) the kitchen waste water is subjected to water quality and water quantity regulation and then primary coagulation flocculation precipitation; 2) adjusting the pH of the wastewater from which the solid matters are removed, and then strongly oxidizing the wastewater; 3) the waste water after oxidation enters a sedimentation tank after secondary flocculation; 4) precipitating and discharging water into an anaerobic hydrolysis reactor; 5) anaerobic biochemical effluent enters an anoxic reactor; 6) the effluent of the anoxic reactor enters an aerobic reactor; 7) after aerobic biochemical treatment, the effluent enters a secondary anoxic biochemical tank; 8) the effluent of the secondary anoxic reactor enters an MBR reactor and then enters a water outlet pool; 9) the wastewater in the effluent pool enters the advanced treatment device after being flocculated and precipitated again, and the wastewater reaches the standard after advanced treatment. The kitchen wastewater treatment method can effectively treat the kitchen wastewater, has high safety degree in the treatment process, does not generate methane in the whole process, improves the safety degree, and reduces the requirement on the installation environment.
Description
Technical Field
The invention relates to the technical field of kitchen wastewater treatment, in particular to a kitchen wastewater treatment method.
Background
The pollutant components of the kitchen wastewater have high organic matter content, COD reaches 120000mg/L, and the kitchen wastewater also contains a certain amount of organic solid and a certain amount of emulsified oil, so that the kitchen wastewater is very difficult to treat, and the effect of the existing kitchen wastewater treatment method is not ideal enough and needs to be further improved.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a kitchen wastewater treatment method, which comprises the following steps:
1) kitchen waste water enters an adjusting tank through a pump, and the waste water is adjusted in the adjusting tank; the wastewater in the regulating tank is lifted into a solid matter removing system at a designed flow, and solid matters in the wastewater are removed through primary coagulation flocculation and precipitation;
2) after the PH of the wastewater from which the solid matters are removed is adjusted, the effluent automatically flows into a physicochemical strong oxidation system to degrade toxic and harmful substances of organic matters in the wastewater, so that the biodegradability of the wastewater is improved, and the subsequent biochemical treatment is facilitated;
3) after oxidation, the wastewater enters a sedimentation tank after secondary flocculation;
4) the precipitated water enters an anaerobic hydrolysis reactor and is baffled and stayed in the anaerobic hydrolysis reactor;
5) the anaerobic biochemical effluent enters an anoxic reactor for nitrification and denitrification reaction, and COD and nitrate nitrogen in the wastewater are removed under the action of denitrifying bacteria;
6) effluent of the anoxic reactor automatically flows into the aerobic reactor, and organic pollutants in the wastewater are further degraded by using aerobic microorganisms;
7) the effluent after aerobic biochemical treatment automatically flows into a secondary anoxic biochemical tank, and the C/N ratio in the secondary anoxic reactor is adjusted by a carbon source adding device, so that the denitrification is carried out more fully;
8) the effluent water after passing through the secondary anoxic reactor enters an MBR (membrane bioreactor), and the wastewater in the MBR enters a water outlet pool through a self-priming pump;
9) waste water in the effluent pond flows automatically after flocculation and precipitation once more and gets into advanced treatment unit, ensures that waste water is up to standard through advanced treatment.
Preferably, in the step 4), the anaerobic hydrolysis reactor has large biomass and rich biological phase, can bear higher organic load, and has good bearing capacity on toxic and harmful substances in the inlet water.
Preferably, in the step 4), most of the difficultly biodegradable macromolecular organic matters in the original wastewater are converted into biodegradable micromolecular organic matters, so that obvious hydrolysis and acidification effects can be obtained, the biodegradability of the wastewater is improved, the subsequent biochemical process is facilitated, and the condition that methane cannot be generated in the process needs to be explained.
Preferably, in the step 8), the mixed liquor and the effluent in the MBR are simultaneously refluxed to the front-stage biochemical reaction zone in proportion; and the residual sludge is discharged to a sludge tank regularly.
Preferably, in the step 9), if the effluent of the MBR reaches the standard, the wastewater in the effluent tank can surpass the advanced treatment device and be directly discharged.
Preferably, all sludge generated by wastewater treatment is collected into a sludge tank, discharged into the sludge tank by a sludge lifting pump, concentrated by gravity and pumped into a screw stacking machine for dehydration; the sludge is periodically transported into a landfill site for landfill; and (4) continuously treating the filtrate by flowing into a regulating tank.
Preferably, the front-stage biochemical reaction zone comprises an anaerobic hydrolysis reactor, an anoxic reactor, an aerobic reactor and a secondary anoxic reactor.
The invention has the advantages and beneficial effects that: the invention provides a kitchen wastewater treatment method, which can effectively treat kitchen wastewater, has high safety degree in the treatment process, does not generate methane in the whole process, improves the safety degree, and reduces the requirement on the installation environment.
The kitchen waste water treatment method can solve the problem of treatment of sewage generated by treatment of medium and small kitchen waste and kitchen waste, can realize three-level up-to-standard discharge and one-level direct discharge, and can effectively solve the problem of medium and small kitchen waste.
The kitchen wastewater treatment method has the advantages of modularization of equipment, small occupied area, short installation period and high investment cost-efficiency ratio.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The technical scheme of the specific implementation of the invention is as follows:
the invention provides a kitchen wastewater treatment method, which comprises the following steps:
1) kitchen waste water enters an adjusting tank through a pump, and the waste water is adjusted in the adjusting tank; the wastewater in the regulating tank is lifted into a solid matter removing system at a designed flow, and solid matters in the wastewater are removed through primary coagulation flocculation and precipitation;
2) after the PH of the wastewater from which the solid matters are removed is adjusted, the effluent automatically flows into a physicochemical strong oxidation system to degrade toxic and harmful substances of organic matters in the wastewater, so that the biodegradability of the wastewater is improved, and the subsequent biochemical treatment is facilitated;
3) after oxidation, the wastewater enters a sedimentation tank after secondary flocculation;
4) the precipitated water enters an anaerobic hydrolysis reactor and is baffled and stayed in the anaerobic hydrolysis reactor; the anaerobic hydrolysis reactor has large biomass, rich biological phase, can bear higher organic load and has good bearing capacity on toxic and harmful substances in the inlet water; most of the difficultly biodegradable macromolecular organic matters in the original wastewater are converted into biodegradable micromolecular organic matters, so that obvious hydrolysis and acidification effects can be obtained, the biodegradability of the wastewater is improved, the subsequent biochemical process is facilitated, and the process does not generate methane;
5) the anaerobic biochemical effluent enters an anoxic reactor for nitrification and denitrification reaction, and COD and nitrate nitrogen in the wastewater are removed under the action of denitrifying bacteria;
6) effluent of the anoxic reactor automatically flows into the aerobic reactor, and organic pollutants in the wastewater are further degraded by using aerobic microorganisms;
7) the effluent after aerobic biochemical treatment automatically flows into a secondary anoxic biochemical tank, and the C/N ratio in the secondary anoxic reactor is adjusted by a carbon source adding device, so that the denitrification is carried out more fully;
8) the effluent water after passing through the secondary anoxic reactor enters an MBR (membrane bioreactor), and the wastewater in the MBR enters a water outlet pool through a self-priming pump; simultaneously, refluxing the mixed liquid and the effluent in the MBR reactor to the front-stage biochemical reaction area in proportion; the residual sludge is discharged to a sludge tank at regular intervals;
9) the wastewater in the effluent tank automatically flows into the advanced treatment device after being flocculated and precipitated again, the wastewater is ensured to reach the standard through advanced treatment, and if the effluent of the MBR can reach the standard, the wastewater in the effluent tank can surpass the advanced treatment device and is directly discharged;
all sludge generated by wastewater treatment is collected into a sludge tank, discharged into the sludge tank by a sludge lifting pump, gravity-concentrated and pumped into a screw stacking machine for dehydration; the sludge is periodically transported into a landfill site for landfill; and (4) continuously treating the filtrate by flowing into a regulating tank.
The front-stage biochemical reaction zone comprises an anaerobic hydrolysis reactor, an anoxic reactor, an aerobic reactor and a secondary anoxic reactor.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A kitchen wastewater treatment method is characterized by comprising the following steps:
1) kitchen waste water enters an adjusting tank through a pump, and the waste water is adjusted in the adjusting tank; the wastewater in the regulating tank is lifted into a solid matter removing system at a designed flow, and solid matters in the wastewater are removed through primary coagulation flocculation and precipitation;
2) after the PH of the wastewater from which the solid matters are removed is adjusted, the effluent automatically flows into a physicochemical strong oxidation system to degrade toxic and harmful substances of organic matters in the wastewater, so that the biodegradability of the wastewater is improved, and the subsequent biochemical treatment is facilitated;
3) after oxidation, the wastewater enters a sedimentation tank after secondary flocculation;
4) the precipitated water enters an anaerobic hydrolysis reactor and is baffled and stayed in the anaerobic hydrolysis reactor;
5) the anaerobic biochemical effluent enters an anoxic reactor for nitrification and denitrification reaction, and COD and nitrate nitrogen in the wastewater are removed under the action of denitrifying bacteria;
6) effluent of the anoxic reactor automatically flows into the aerobic reactor, and organic pollutants in the wastewater are further degraded by using aerobic microorganisms;
7) the effluent after aerobic biochemical treatment automatically flows into a secondary anoxic biochemical tank, and the C/N ratio in the secondary anoxic reactor is adjusted by a carbon source adding device, so that the denitrification is carried out more fully;
8) the effluent water after passing through the secondary anoxic reactor enters an MBR (membrane bioreactor), and the wastewater in the MBR enters a water outlet pool through a self-priming pump;
9) waste water in the effluent pond flows automatically after flocculation and precipitation once more and gets into advanced treatment unit, ensures that waste water is up to standard through advanced treatment.
2. The kitchen wastewater treatment method according to claim 1, wherein in the step 4), the anaerobic hydrolysis reactor has large biomass, rich biological phase, can bear higher organic load, and has good bearing capacity on toxic and harmful substances in the influent water.
3. The kitchen wastewater treatment method according to claim 2, wherein in the step 4), most of the difficultly biodegradable macromolecular organic matters in the original wastewater are converted into biodegradable micromolecular organic matters, so that obvious hydrolysis and acidification effects can be obtained, the biodegradability of the wastewater is improved, and the subsequent biochemical process is facilitated.
4. The kitchen wastewater treatment method according to claim 3, characterized in that in step 8), the mixed liquor and the effluent in the MBR are proportionally refluxed into the front-stage biochemical reaction zone; and the residual sludge is discharged to a sludge tank regularly.
5. The kitchen wastewater treatment method according to claim 4, wherein in the step 9), if MBR effluent reaches the standard, wastewater in the effluent tank can surpass the advanced treatment unit and be directly discharged.
6. The kitchen wastewater treatment method according to claim 5, characterized in that all sludge generated by wastewater treatment is collected into a sludge tank, discharged into the sludge tank by a sludge lift pump, gravity-concentrated and pumped into a screw stacking machine for dehydration; the sludge is periodically transported into a landfill site for landfill; and (4) continuously treating the filtrate by flowing into a regulating tank.
7. The kitchen wastewater treatment method according to claim 6, characterized in that the front-stage biochemical reaction zone comprises an anaerobic hydrolysis reactor, an anoxic reactor, an aerobic reactor and a secondary anoxic reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010563061.4A CN111762961A (en) | 2020-06-19 | 2020-06-19 | Kitchen wastewater treatment method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010563061.4A CN111762961A (en) | 2020-06-19 | 2020-06-19 | Kitchen wastewater treatment method |
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| CN111762961A true CN111762961A (en) | 2020-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010563061.4A Pending CN111762961A (en) | 2020-06-19 | 2020-06-19 | Kitchen wastewater treatment method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113816562A (en) * | 2021-09-07 | 2021-12-21 | 上海泓济环保科技股份有限公司 | Modular kitchen waste wastewater treatment process and system |
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| CN201520698U (en) * | 2009-09-20 | 2010-07-07 | 浙江华强环境科技有限公司 | Leachate treatment system based on MBR system and nano-filtration system |
| CN203159392U (en) * | 2013-03-19 | 2013-08-28 | 李继明 | Chemical wastewater treatment device |
| CN103570195A (en) * | 2013-11-13 | 2014-02-12 | 江南大学 | Efficient aerobic treatment method for kitchen anaerobic wastewater |
| CN103739173A (en) * | 2014-02-10 | 2014-04-23 | 湖南海尚环保投资有限公司 | Kitchen wastewater treatment method |
| CN204874205U (en) * | 2015-08-05 | 2015-12-16 | 重庆杰润科技有限公司 | Kitchen garbage effluent disposal system |
| CN107162318A (en) * | 2017-05-22 | 2017-09-15 | 武汉泰昌源环保科技有限公司 | A kind of high concentration, the organic pharmacy wastewater treatment device of difficult degradation and processing method |
| CN107311402A (en) * | 2017-08-11 | 2017-11-03 | 中机国际工程设计研究院有限责任公司 | A kind of Kitchen wastewater treatment method |
| CN107572729A (en) * | 2017-10-21 | 2018-01-12 | 浙江千尧环境工程有限公司 | A kind of Waste Water Treatment of rubbish from cooking penetrating fluid |
-
2020
- 2020-06-19 CN CN202010563061.4A patent/CN111762961A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201520698U (en) * | 2009-09-20 | 2010-07-07 | 浙江华强环境科技有限公司 | Leachate treatment system based on MBR system and nano-filtration system |
| CN203159392U (en) * | 2013-03-19 | 2013-08-28 | 李继明 | Chemical wastewater treatment device |
| CN103570195A (en) * | 2013-11-13 | 2014-02-12 | 江南大学 | Efficient aerobic treatment method for kitchen anaerobic wastewater |
| CN103739173A (en) * | 2014-02-10 | 2014-04-23 | 湖南海尚环保投资有限公司 | Kitchen wastewater treatment method |
| CN204874205U (en) * | 2015-08-05 | 2015-12-16 | 重庆杰润科技有限公司 | Kitchen garbage effluent disposal system |
| CN107162318A (en) * | 2017-05-22 | 2017-09-15 | 武汉泰昌源环保科技有限公司 | A kind of high concentration, the organic pharmacy wastewater treatment device of difficult degradation and processing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113816562A (en) * | 2021-09-07 | 2021-12-21 | 上海泓济环保科技股份有限公司 | Modular kitchen waste wastewater treatment process and system |
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Application publication date: 20201013 |